linux-kernel - [PATCH V2] IIO channel type and modifiers for CCT and RGBC data

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Date:	Wed, 16 May 2012 10:46:42 -0500
From:	Jon Brenner <jbrenner@...sinc.com>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	linux-iio <linux-iio@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH V2] IIO channel type and modifiers for CCT and RGBC data

Add iio channel type and modifiers for Correlated Color Temperature (CCT)
and RGBC (red/green/blue/clear) data.
Add CCT and RGBC descriptions to documentation.

Changes:
Revised/condensed RGBC descriptions.

Signed-off-by: Jon Brenner <jbrenner@...sinc.com>
---
 drivers/iio/industrialio-core.c                    |    5 ++++
 .../staging/iio/Documentation/sysfs-bus-iio-light  |   23 ++++++++++++++++++++
 include/linux/iio/types.h                          |    5 ++++
 3 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 1ddd886..34d8cc9 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -64,6 +64,7 @@ static const char * const iio_chan_type_name_spec[] = {
 	[IIO_TIMESTAMP] = "timestamp",
 	[IIO_CAPACITANCE] = "capacitance",
 	[IIO_ALTVOLTAGE] = "altvoltage",
+	[IIO_CCT] = "cct",
 };

 static const char * const iio_modifier_names[] = {
@@ -72,6 +73,10 @@ static const char * const iio_modifier_names[] = {
 	[IIO_MOD_Z] = "z",
 	[IIO_MOD_LIGHT_BOTH] = "both",
 	[IIO_MOD_LIGHT_IR] = "ir",
+	[IIO_MOD_LIGHT_CLEAR] = "clear",
+	[IIO_MOD_LIGHT_RED] = "red",
+	[IIO_MOD_LIGHT_GREEN] = "green",
+	[IIO_MOD_LIGHT_BLUE] = "blue",
 };

 /* relies on pairs of these shared then separate */
diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
index 715c74d..83a2876 100644
--- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
@@ -34,6 +34,15 @@ Description:
 		it comes back in SI units, it should also include _input else it
 		should include _raw to signify it is not in SI units.

+What:		/sys/bus/iio/devices/device[n]/in_cct0[_input|_raw]
+KernelVersion:	3.4.0
+Contact:	linux-iio@...r.kernel.org
+Description:
+		This should return the correlated color temperature from the
+		light sensor. If it comes back in SI units, it should also
+		include _input else it should include _raw to signify it is not
+		in SI units.
+
 What:		/sys/.../device[n]/proximity_on_chip_ambient_infrared_supression
 KernelVersion:	2.6.37
 Contact:	linux-iio@...r.kernel.org
@@ -82,3 +91,17 @@ Contact:	linux-iio@...r.kernel.org
 Description:
 		This property gets/sets the table of coefficients
 		used in calculating illuminance in lux.
+
+What:		/sys/bus/iio/devices/device[n]/in_intensity_clear[_input|_raw]
+What:		/sys/bus/iio/devices/device[n]/in_intensity_red[_input|_raw]
+What:		/sys/bus/iio/devices/device[n]/in_intensity_green[_input|_raw]
+What:		/sys/bus/iio/devices/device[n]/in_intensity_blue[_input|_raw]
+KernelVersion:	3.4.0
+Contact:	linux-iio@...r.kernel.org
+Description:
+		This property is supported by sensors that have a RGBC
+		sensing mode. This value should be the output from a reading
+		and if expressed in SI units, should include _input. If this
+		value is not in SI units (irradiance, uW/mm), then it should
+		include _raw.
+
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 1b073b1..a7de5d9 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -28,6 +28,7 @@ enum iio_chan_type {
 	IIO_TIMESTAMP,
 	IIO_CAPACITANCE,
 	IIO_ALTVOLTAGE,
+	IIO_CCT,
 };

 enum iio_modifier {
@@ -45,6 +46,10 @@ enum iio_modifier {
 	IIO_MOD_X_OR_Y_OR_Z,
 	IIO_MOD_LIGHT_BOTH,
 	IIO_MOD_LIGHT_IR,
+	IIO_MOD_LIGHT_CLEAR,
+	IIO_MOD_LIGHT_RED,
+	IIO_MOD_LIGHT_GREEN,
+	IIO_MOD_LIGHT_BLUE,
 };

 #define IIO_VAL_INT 1
--
1.7.4.1

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